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Ferocious
Advanced Cheater
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Joined: 06 Feb 2008
Posts: 54
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 Posted: Wed Jun 11, 2008 9:16 am Post subject: |
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what od you mean im not doing anything?
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HalfPrime
Grandmaster Cheater
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Joined: 12 Mar 2008
Posts: 532
Location: Right there...On your monitor
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| Posted: Wed Jun 11, 2008 11:42 am Post subject: |
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He's talking about the variables that Flyte mentioned.
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oib111
I post too much
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Joined: 02 Apr 2007
Posts: 2947
Location: you wanna know why?
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| Posted: Wed Jun 11, 2008 5:09 pm Post subject: |
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All my variables were used. I had to clean up ferocious code. He has this.
| Code: |
BOOL TrampolineAPI(HMODULE hModule, LPCWSTR DllName, LPCSTR ProcName, DWORD dwReplaced)
{
DWORD dwOldProtect;
DWORD dwAddressToHook = (DWORD)GetProcAddress(GetModuleHandle(DllName), ProcName);
DebugPrint(L"dwAddressToHook : %X", dwAddressToHook);
BYTE *pbTargetCode = (BYTE *)dwAddressToHook;
BYTE *pbReplaced = (BYTE *)dwReplaced;
VirtualProtect((LPVOID)dwAddressToHook, 5, PAGE_EXECUTE_READWRITE, &dwOldProtect);
*pbTargetCode++ = 0xE9;
*((signed int*)(pbTargetCode)) = pbReplaced - (pbTargetCode + 4);
VirtualProtect((LPVOID)dwAddressToHook, 5, PAGE_EXECUTE, &dwOldProtect);
dwReturn = dwAddressToHook + 5;
FlushInstructionCache(GetCurrentProcess(), NULL, NULL);
return TRUE;
}
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Not used or needed or works:
OldProtect
DebugPrint()
dwReturn // not even decalred
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| 8D wrote: |
cigs dont make people high, which weed does, which causes them to do bad stuff. like killing |
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Ferocious
Advanced Cheater
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Joined: 06 Feb 2008
Posts: 54
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| Posted: Wed Jun 11, 2008 5:29 pm Post subject: |
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OldProtect:
| Code: | BOOL WINAPI VirtualProtect(
__in LPVOID lpAddress,
__in SIZE_T dwSize,
__in DWORD flNewProtect,
__out PDWORD lpflOldProtect
); |
lpflOldProtect [out]
A pointer to a variable that receives the previous access protection value of the first page in the specified region of pages. If this parameter is NULL or does not point to a valid variable, the function fails.
DebugPrint:
as for the the DebugPrint it was just for debugging purposes.
dwReturn:
and dwReturn, lol you figure it out yourself why I have that there.
since you condemned its useless.
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I wanna hack, but I don't know how...
Last edited by Ferocious on Wed Jun 11, 2008 5:41 pm; edited 1 time in total |
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Flyte
Peanuts!!!!
 Reputation: 6
Joined: 19 Apr 2006
Posts: 1887
Location: Canada
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| Posted: Wed Jun 11, 2008 5:36 pm Post subject: |
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| Code: | BYTE *ATH = (BYTE*)AddressToHook;
BYTE *ATU = (BYTE*)Replace; |
It's incredibly redundant.
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oib111
I post too much
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Joined: 02 Apr 2007
Posts: 2947
Location: you wanna know why?
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| Posted: Wed Jun 11, 2008 5:46 pm Post subject: |
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So you suggest this?
| Code: |
BOOL APIHOOK(LPCSTR DllName, LPCSTR API, DWORD Replace) {
DWORD AddressToHook = (DWORD)GetProcAddress(LoadLibrary(DllName), API);
DWORD oldprotect;
VirtualProtect((LPVOID)AddressToHook, 5, PAGE_EXECUTE_READWRITE, &oldprotect);
(BYTE)AddressToHook++ = 0xE9;
(signed int)((BYTE)(AddressToHook)) = (BYTE)Replace-((BYTE)(AddressToHook+4));
VirtualProtect((LPVOID)AddressToHook, 5, PAGE_EXECUTE, &oldprotect);
FlushInstructionCache(GetCurrentProcess(), NULL, NULL);
return TRUE;
}
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| 8D wrote: |
cigs dont make people high, which weed does, which causes them to do bad stuff. like killing |
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lurc
Grandmaster Cheater Supreme
 Reputation: 2
Joined: 13 Nov 2006
Posts: 1900
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| Posted: Wed Jun 11, 2008 6:09 pm Post subject: |
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Eh... For the second VirtualProtect are you reverting the memory? if you are, why are u setting it as PAGE_EXECUTE, instead use the oldprotect
Also "signed" is not needed with the int because the compiler by default uses signed integer type's unless defined as unsigned.
use BYTE*/PBYTE/LPBYTE btw for the modifying.
Edit
Well, I did my own little function, rearranging the code and function a bit,
I didn't test it but it should work...
| Code: | BOOL HookApi( LPCTSTR lpModule, LPCSTR lpAPI, PVOID pFunction )
{
DWORD dwOldProt, dwJunk;
DWORD dwApiAddy = (DWORD)GetProcAddress( LoadLibrary( lpModule ), lpAPI );
if ( dwApiAddy )
{
if ( VirtualProtect( &dwApiAddy, 5, PAGE_EXECUTE_READWRITE, &dwOldProt ) )
{
*(PBYTE)dwApiAddy = 0xE9;
*(PDWORD)(dwApiAddy + 1) = (DWORD)pFunction - dwApiAddy - 5;
if ( VirtualProtect( &dwApiAddy, 5, dwOldProt, &dwJunk ) )
{
if ( FlushInstructionCache( GetCurrentProcess(), NULL, NULL ) )
return TRUE;
}
}
}
return FALSE;
} |
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oib111
I post too much
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Joined: 02 Apr 2007
Posts: 2947
Location: you wanna know why?
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| Posted: Wed Jun 11, 2008 6:43 pm Post subject: |
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Always wondered why he didn't use oldprotect like that. And why he didn't error check. I guess I would have done something like...
| Code: |
BOOL APIHOOK(LPCSTR DllName, LPCSTR API, DWORD Replace) {
DWORD oldprotect, postop;
DWORD AddressToHook = (DWORD)GetProcAddress(LoadLibrary(DllName), API);
if(VirtualProtect((LPVOID)AddressToHook, 5, PAGE_EXECUTE_READWRITE, &oldprotect)) {
*(PBYTE)AddressToHook++ = 0xE9;
*((int*)(AddressToHook)) = Replace-(AddressToHook+4); //whats difference between using +4 and -5
if(VirtualProtect((LPVOID)AddressToHook, 5, oldprotect, &postop)) {
if(FlushInstructionCache(GetCurrentProcess(), NULL, NULL)) {
return TRUE;
}
}
}
return FALSE;
}
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Ok, and as I put, whats the dif between using +4 and -5? And also, is using "*((int*)(AddressToHook))" and "*(PDWORD)AddressToHook" basically the same?
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| 8D wrote: |
cigs dont make people high, which weed does, which causes them to do bad stuff. like killing |
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Ferocious
Advanced Cheater
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Joined: 06 Feb 2008
Posts: 54
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| Posted: Thu Jun 12, 2008 1:28 am Post subject: |
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| oib111 wrote: | | Always wondered why he didn't use oldprotect like that. |
so that if any process trying to write the memory will return, access violation.
as PAGE_EXECUTE : An attempt to read or write to the committed region results in an access violation.
and PAGE_EXECUTE_READWRITE : Enables execute, read, and write access to the committed region of pages, which allow all three acess.
| oib111 wrote: | | And why he didn't error check. |
Because the code you are using basically is just a pseudo.
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oib111
I post too much
Reputation: 0
Joined: 02 Apr 2007
Posts: 2947
Location: you wanna know why?
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| Posted: Thu Jun 12, 2008 7:52 am Post subject: |
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Ok, btw, whats the difference between using +4 and -5? Like...
| Code: |
*((int*)(ATH)) = ATU-(ATH+4);
//or
*((int*)(ATH)) = ATU-(ATH-5);
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And I understand your calculating the offset for jump, but why do you use the +4 and -5?
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| 8D wrote: |
cigs dont make people high, which weed does, which causes them to do bad stuff. like killing |
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